Just in case you were wondering what that CGM graph looked like on my terrible, horrible, no good, very bad day. That nice flat line at the top is when my CGM just read "HIGH" for several hours, whereas right before and after during those troughs, my CGM just read "LOW". :) Fun, fun, fun, fun!
Also, I have no idea why the picture posted sideways. I did not take the picture like that. Weird. I'm having too much of a crap day to try to fix it, so you'll just have to bend your head 90 degrees! :)